Mitsubishi A1SJH - Appendix 2.2 Special Registers D

APPENDICES
APP - 18
MELSEC-
A
Appendix 2.2 Special Registers D
The special registers are data registers used for specific purposes. Therefore, do
not write data to the special registers in the program (except the ones with numbers
marked *2 in the table).
Table 2.2 Special registers list
Number Name Description Details Applicable CPU
D9000 Fuse blow
Fuse blow module
number
• When fuse blown modules are detected, the lowest
number of detected units is stored in hexadecimal.
(Example: When fuses of Y50 to 6F output modules
have blown, "50" is stored in hexadecimal) To monitor
the number by peripheral devices, perform monitor
operation given in hexadecimal.
(Cleared when all contents of D9100 to D9107 are reset
to 0.)
• Fuse blow check is executed also to the output modules
of remote I/O stations.
Unusable with
A0J2H.
Only remote
I/O station in-
formation is
valid for A2C.
• Stores the module numbers corresponding to setting
switch numbers or base slot numbers when fuse blow
occurred.
I/O Module for A0J2 Extension Base Unit
Setting
Switch
Stored Data
Base Unit
Slot No.
Stored Data
0
105
1216
2327
3438
45
56
67
78
D9001 Fuse blow
Fuse blow module
number
• In case of remote I/O station, (module I/O number/10
H
) +
1 is stored.
—
Dedicated to
A0J2H.
• If I/O modules, of which data are different from data
entered, are detected when the power is turned on, the
first I/O number of the lowest number unit among the
detected units is stored in hexadecimal. (Storing method
is the same as that of D9000.) To monitor the number by
peripheral devices, perform monitor operation given in
hexadecimal.
(Cleared when all contents of D9116 to D9123 are reset
to 0.)
• I/O module verify check is executed also to the modules
of remote I/O terminals.
Unusable with
A0J2H.
Only remote
I/O station in-
formation is
valid for A2C.
D9002
I/O module verify
error
I/O module verify error
unit number
• If an I/O module, of which data is different from data
entered, is detected when the power in turned on, the I/O
number corresponding to the setting switch No. or base
unit No. is stored.
(Storing method is the same as that of D9001).
• In case of remote I/O station, (module I/O number/10
H
) +
1 is stored.
—
Dedicated to
A0J2H.